This patch adds scheduler support for the channel combinations that
substitute SDCCH index 2 for a CBCH in either a SDCCH/8 or SDCCH/4.
Change-Id: Icc15603079a1709ec094f400a9bcf0008211890f
Closes: OS#1617
Each logical channel (e.g. SACCH, SDCCH, etc.) has a counter of
lost L2 frames. Let's use a bit better name for it, and correct
its description in the 'l1sched_chan_state' struct definition.
Change-Id: I92ef95f6b3f647170cfd434a970701406b0a7c82
Other backends use already msgb in lower layers and eventually call
add_l1sap_header to push TCH data up the stack.
backends using common/scheduler.c (bts-trx, bts-virt) are the only ones
not yet using msgb in lower layer but only creating the msgb
immediatelly before sending it in _sched_compose_tch_ind. Let's add a
log message there too to have similar output in all BTS backends.
Change-Id: Ia90b051f308abcd8b88b84e861da593844b0d81a
Before this patch we had:
* osmo-bts-trx internally using 1/256th bit/symbol period
* osmo-bts-sysmo internally using 1/4 bit/smbol period
* PCU interface using 1/4
* L1SAP interface using 1/4
* measurement processing code on top of L1SAP using 1/256
So for sysmo/lc15/octphy we are not loosing resolution, but for
osmo-bts-trx we're arbitrarily reducing the resolution via L1SAP
only then to compute with higher resolution again.
Let's change L1SAP to use 1/256 bits and hence not loose any resolution.
This requires a corresponding change in libosmocore for l1sap.h, which
is found in Change-Id Ibb58113c2819fe2d6d23ecbcfb8b3fce4055025d
Change-Id: If9b0f617845ba6c4aa47969f521734388197c9a7
There's no need to express TOA as a float:
* We receive it as signed 16bit integer in units 1/256 symbol periods
* We pass it to L1SAP as signed integer in 1/4 symbol periods
So turn it into an int16_t with 1/256 symbol period accuracy throughout
the code to avoid both float arithmetic as well as loosing any precision.
Change-Id: Idce4178e0b1f7e940ebc22b3e2f340fcd544d4ec
There are use cases for the multiframe scheduler tables outside the
context of the entire scheduler. Let's prepare for that.
Related: OS#2978
Change-Id: I6a501e66c47809ae3cdc55bef2cb6390ee0096b1
Whenever we receive discontinuous frame numbers from the TRX socket,
osmo-bts-trx is substituting zero-filled bursts for those frame numbers
which we missed. Don't just do this silently, but actually log about
it, as it is an error.
Note: This [currently] happens when using a virtual air interface with trxcon
as opposed to a real SDR receiver with osmo-trx.
Change-Id: If79eab37c80647c9ab64f399fa4676d97af3e9ad
For proper measurement processing of RX{LEV,QUAL}-SUB, we will
need this information.
Related: OS#2978
Change-Id: I768fde62452a74dce471ebf946e56eb1e4de1abc
Let's split the look-up of the multiframe scheduler from the asignment
to a given l1ts in trx_sched_set_pchan.
Related: OS#2978
Change-Id: I79548b25aae647ce993a9d83c771d22b08cb1c74
So far, L1SAP code is hiding RSL_CHAN_OSMO_PDCH from the bts specific
code below L1SAP. This is some kind of a hack/workaround, making code
and debug output / logs more difficult to understand.
So let's teach the lower layer how to treat RSL_CHAN_OSMO_PDCH and
remove the "hiding" code from the common l1sap.c code.
Change-Id: Iaaa833febe45b82166d3901f10cc5466a7591c19
Previously if multiply phy instances were configured but not used
osmo-bts-trx would segfault. Terminate with clear error message instead
so user can correct configuration. Example configuration which caused
problem:
...
phy 0
instance 0
instance 1
...
trx 0
phy 0 instance 0
Note the 2nd instance of phy 0 which is not used in trx later on.
Change-Id: Id979506731ea92401458f1060e87aeb690901539
Fill in values for BER, BTO, Link quality in L1SAP and send them to
PCU. Note: this increases the version of BTS <-> PCU protocol. It also
requires corresponding changes in libosmocore.
All BTS models provide measurements data unless direct DSP access for
PCU is enabled. For BTS-specific notes see below.
Octphy: conversion from sSNRDb to Link Quality uses formulae which works
in practice instead of what's documented for sSNRDb value. Subject to
change in future revisions.
TRX: C / I link quality estimator is not computed.
Change-Id: Ic9693a044756fb1c7bd2ff3cfa0db042c3c4e01c
Related: OS#1616
Existing interfaces are coded with the implicit expectation of using
a burst sequence length of 148, which is constant with GSM and GPRS.
That changes with EGPRS, where the burst length may be 444 due to
the use of 8-PSK instead of GMSK modulation.
Setup the interface to accept and return a length value with the
burst sequence. This allows 444 length bit vectors to/from the
EGPRS decoder/encoder. Length is explicitly used as a identifier for
8-PSK vs. GMSK modulated sequences.
Change-Id: I90b46b46b11b6ce280e7f8232d5a2fccec2d4f18
Signed-off-by: Tom Tsou <tom.tsou@ettus.com>
Includes EGPRS specific convolutional codes, interleaving tables
and functions, burst mappings, training sequences, and parity
checks from 3GPP TS 44.060 needed to handle MCS codings 1-9.
Change-Id: Ie270398dd7a72f282ba53e646853d8de1eabee93
Signed-off-by: Tom Tsou <tom.tsou@ettus.com>
Previously osmo-bts-octphy have not provided in-band presence
information which cause off-by-one errors and misinterpretation of
ph_data_ind by PCU. This fixed now by adding support for explicitly
passing PH-DATA presence info. Corresponding check and in-band passing
of presence information are removed.
Note: this requires libosmocore version with osmo_ph_pres_info_type
support integrated.
[hfreyther/max: Remove + 1 from the decoded length]
Harald Welte
Vadim Yanitskiy
Pau Espin